The Blues have had an inconsistent start to their campaign, which has placed them fifth in the Premier League table after six games.
Some have suggested that the Portuguese coach is struggling to find his best team among a hoard of young midfield talent.
"Every weekend someone can lose points," Mourinho said in a press conference. "In relation to my team at this moment, we are not strong enough to be dominant in every match and win consecutively. That is my point of view."
Chelsea go up against Norwich City on Sunday.